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Finding the Fourth Proportional to 502.69, 693.65 and 281.56

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Solution

The fourth proportional to 502.69, 693.65 and 281.56 is: 388.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.69 : 693.65 = 281.56 : x
  2. Step 2: Convert to fraction form
    502.69/693.65 = 281.56/x
  3. Step 3: Cross multiply
    502.69x = 693.65 × 281.56
  4. Step 4: Simplify right side
    502.69x = 195,299.22
  5. Step 5: Solve for x
    x = 195,299.22/502.69
  6. Step 6: Final answer
    x = 388.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.